Step 1 Take notes on the sentences, lines, and ideas that seem most important. The following direct quotes seem to encapsulate the most important elements of the article:

“to prepare the strongest warning yet that climate change is man-made and will cause more heatwaves, droughts and floods this century unless governments take action.”

“Officials from up to 195 governments and scientists will meet in Stockholm from September 23-26 to edit a 31-page draft that also tries to explain why the pace of warming has slowed this century despite rising human emissions of greenhouse gases.”

“a main guide for governments, which have agreed to work out a United Nations deal by the end of 2015 to avert the worst impacts.”

“at least a 95 percent probability – to be the main cause of warming since the 1950s.”

“‘There is high confidence that this has warmed the ocean, melted snow and ice, raised global mean sea level, and changed some climate extremes,’ the draft says of man-made warming.”

“In itself, a shift from 90 to 95 percent ‘would not be a huge short of adrenalin’ for spurring government and public awareness… extreme weather events, such as a 2010 drought in Russia that pushed up world grain prices, or last year’s Superstorm Sandy in the United States, meant that ‘there is more of a visceral feel for climate change among the public.'”

“Trying to boost weak global economic growth, governments have focused relatively little on climate change since failing to agree a U.N. deal at a summit in Copenhagen in 2009.”

“the IPCC will face extra scrutiny after the 2007 report exaggerated the rate of melt of the Himalayan glaciers. A review of the IPCC said that the main conclusions were unaffected by the error.”

“‘A combination of natural variations and other factors such as sun-dimming volcanic eruptions have caused the hiatus,’ it says, predicting a resumption of warming in coming years. The report also finds that the atmosphere may be slightly less sensitive to a build-up of carbon dioxide than expected.”

Step 2: Consider the purpose of your summary to decide which aspects of the article are most important. This does not mean ignore the parts that disagree with you.

Question, for instance, whether it is more important that scientists are preparing for a meeting, that they are preparing to warn us about global warming, OR whether the things they are going to warn us about are actually the most important aspects of the article.

Depending on the aim of your paper, you might want to highlight different aspects. If you focus on the things they are set to warn us about, then you are left with the following ideas:

“The fifth report of the IPCC will offer to prepare the strongest warning yet that climate change is man-made and will cause more heatwaves, droughts and floods this century unless governments take action.”

“at least a 95 percent probability – to be the main cause of warming since the 1950s.”

“There is high confidence that this has warmed the ocean, melted snow and ice, raised global mean sea level, and changed some climate extremes,”

“extreme weather events, such as a 2010 drought in Russia that pushed up world grain prices, or last year’s Superstorm Sandy in the United States, meant that ‘there is more of a visceral feel for climate change among the public.'”

“Trying to boost weak global economic growth, governments have focused relatively little on climate change since failing to agree a U.N. deal at a summit in Copenhagen in 2009.”

“the IPCC will face extra scrutiny after the 2007 report exaggerated the rate of melt of the Himalayan glaciers. A review of the IPCC said that the main conclusions were unaffected by the error.”

“A combination of natural variations and other factors such as sun-dimming volcanic eruptions have caused the hiatus, it says, predicting a resumption of warming in coming years. The report also finds that the atmosphere may be slightly less sensitive to a build-up of carbon dioxide than expected.”

Step 3: Find a way to combine these ideas in a way that is easy to read (i.e.: not just a collection of randomly presented factoids) and remains true to the ideas presented in the article.

The fifth report of the IPCC will assert “at least a 95% probability” that human activities are the main cause of global warming since the 1950s and that left unchecked, people can expect the warming to cause more extreme weather events over this century. The report will caution that the impacts of climate change will be worsened if governments do not act to drastically curtail greenhouse gas emissions. The 4th report of the IPCC asserted a 90% probability that human activities were responsible for driving climate change, and though they do not expect the increase in probability to spur greater public awareness, scientists suggest that recent extreme weather events have made climate change more visible to the public. They likewise suggest that global economic considerations have decreased governments’ foci on global warming since the failed UN summit in Copenhagen in 2009. The IPCC will explain the 15-year hiatus in global warming by detailing “a combination of natural variations” and predicts resumption of the warming in coming years.